A Study to Evaluate Efficacy and Safety of BGM1812 Injection in Overweight or Obese Participants Without Diabetes

Inclusion Criteria: * ○ Participants must be Chinese, non-diabetic, overweight or obese individuals aged 18 to 55 years (inclusive), as determined by the time of signing the informed consent form. Both men and women are eligible. * Obese participants: BMI ≥ 28.0 kg/m²; or overweight participants: 24.0 kg/m² ≤ BMI \< 28.0 kg/m² and have at least one of the following conditions: i. Pre-diabetes (impaired fasting glucose and/or impaired glucose tolerance), hypertension, non-alcoholic fatty liver disease, or dyslipidemia; ii. Weight-bearing joint pain; iii. Obesity-induced breathing difficulties or obstructive sleep apnea syndrome. * Participants must have undergone at least 12 weeks of diet and exercise control before screening, with a weight change of less than 5.0% (self-reported), and be willing to continue with the same diet and exercise control during the trial period. Exclusion Criteria: * ● Within the previous 12 weeks, used drugs for weight control. * Within the previous 12 weeks, used other drugs or supplements for weight loss purposes, or meal replacement products, including other prescription drugs, over-the-counter drugs, Chinese herbal medicines, supplements, meal replacement products (whether for weight loss purposes is determined by the prescription or product instructions). * At the screening/baseline stage, any one of the following laboratory test indicators meets the following criteria: Glycated hemoglobin (HbA1c) ≥6.5%, fasting blood glucose ≥7.0 mmol/L, or 2-hour blood glucose of oral glucose tolerance test (OGTT) ≥11.1 mmol/L (during screening, participants with fasting blood glucose ranging from 6.1 to 6.9 mmol/L need to undergo the OGTT test). * There is a history or evidence of any of the following diseases:1) (Interview) It belongs to a secondary disease or drug-induced obesity, including: elevated cortisol hormone (such as Cushing's syndrome), obesity caused by damage to the pituitary and hypothalamus, obesity caused by reducing or discontinuing weight loss drugs, etc.;2) (Interview/Examination) Previously or during screening diagnosed with type 1 or type 2 diabetes;3) (Interview) Previously diagnosed with acute or chronic pancreatitis, or pancreatic injury;4) (Interview) Previously diagnosed with thyroid C-cell carcinoma, MEN (multiple endocrine neoplasia) type 2A or 2B, or having a related family history. * Previously had a moderate or severe depression history, or during screening the PHQ-9 (depression screening scale) questionnaire was ≥ 15 points, or had a history of other serious mental illness, or had suicidal tendencies or suicidal behavior.